According to the Undertow Songfacts, The song originally began life as a cover of Nirvana 's "Polly," but mutated into Warpaint's own song with the only similarity being that the words "hurt yourself" appear in both tunes.
Your brown eyes are my blue skies.
They light up the river that the birds fly over.
Better not to quench your thirst.
Better not to be the first one diving in,